Gain making device



May 12,- 1931. L. D. LEWIS 1,304,835

i? GAIN KING DEVICE Fi1ed Aug. 2, 1929 'IIIA'IIII A T TORNEYS.

Patented May 12 1931 STATES LYLE 1). LEWIS, or ooRwIN- CENTER, PENNSYLVANIA GAIN MAKING DEVICE Application filed August 2,1929. {serial No. 383,115. Y i

The device forming the subject matter of the invention is particularly advantageous in forming gains in poles for cross bars and in the-specification the invention is so eX- emplified. With the present invention such gains are finished in one operation and preferably means is provided whereby the bit for drilling the hole for the cross arm screws I is also included. Features and details of the 1%) invention will appear from the specification and claims.

A preferred embodiment of the invention is illustrated in the accompanying drawings as follows r Fig. 1 shows a plan view of the device.

Fig. 2 a section on the line 2-2 in Fig. 1.

Fig. 3an end elevation.

Fig. 4'afront elevation of the device.

Fig. 5 is a section on the line 55 in Fig. 1.

1 marks the pole and 2 the frameof the gain cutting device. This is formed with end plates 3 and front and rear plates 4. The machine is braced by cross bars 5 at the upper front and rear corners.

A chain 6 is secured by a pin 7 to one of the side frames and extends diagonally around the log to the opposite corner of the frame where it is secured on a hook 8 formed on a sliding bar 9. The sliding bar 9 is car- 7 so ried in a guide pocket 10, formed in the corner of the frame. The bar has rack teeth 11 and a pinion 12 meshes with this rack. The pinion is fixed on a shaft 13. The shaft 13 has a squared end by means of which a crank 14 i may be placed on the rod 13 for turning the pinion. A handle 15 is provided for the crank. This is carried by a pin' 16 which extends through the crank. A spring 17 is tensioned against a shoulder 18 on the pin and tends to force it inwardly. The pin is adapted to enter any one of a series of openings 19 in the side plate of the frame. When it is desired to tighten the chain, the chain is hooked on the slide 9 and is through the crank and pinion tightened and locked. By making the crank removable through the squared end of the pinion 13 it may be put in position so that at the point of tightening the handle is brought over the openings 19 50? so that the crank may be locked in tightened position. The frame is providedwith a se ries of teeth 20 which are'ada'pt'ed to engage the pole surface and assist'in holding the, frame in place. I

A boiirshaped guide 21 is arranged i'nthe side of each side plate. Rollers 22 are ranged in these guides and trunnions 23 of aguide frame extend into the rollers 22, the boxsl1aped' guide having an open slot 21d on its inner face to permit thefentrance of thetrunnions. Inner'frame plates 24 extend from the guides 21 to 'the'fron't and rear plates 4. Guide bloc-ks 25 are carried by the trunnions 23 and these blocks are provided with openings 26, the openings 26 being extended through to the edge of the block by slots 27. Saws 28 are arranged in the slots 27 and have bladeba'ckings 29 which operate in the slots 26. The 'sawblades are connected by cross bars 30 and handles 31 are arranged on the cross bars for operating the saws. It will readily be observed that by reciprocating the saws the kerfs may be cut. The frame by the trunnions and blocks moves downwardly with the saws, the trunnions sliding down the slots 21aand the rollers 22' down the inside guides 21.: The saws may be'read ily reciprocated .and I also are free torock slightly asth'e frame maybe left free to rock. Chisel-shaped knives" 32 are mounted on pins 33 extending from one saw blade to' the other They are provided with projections 34 which contact with the cross pins 35for1n ing a stop limiting the downwardm-ovement of the cuttingends of the knives. These knives are preferably staggered as clearly shown in Fig. 1, and are adapted to cut the bottom of the gain. As the saws are reciprocated cuttingthe end walls of the gain the knives or chisels remove the material between thesa-w kerfsrso that as the saws complete their} cutthe gain is completed. A guide block 36is carried by the trunnions. This has a centrally located opening 37 adapted to. receive a bit' 38 driven from a chuckor brace 39.; One of the guide blocks 25- is pro-' vided with a socket 40 at its outer face from which extends an opening 41. A pin 42 extends through the opening41- an'dthe socket- 40. The pin is provided with a shoulder 43 at the inner end of the socket 40 and a spring 44 is arranged between the bottom of the socket and the shoulder and tends to crowd the pin inwardly. The outer end of the pin is provided with a cross pin 45 which is adapted to form a stop and lock the pin from being expelled by the spring. The pin has a knob at its outer end by which it may be manipulated. The inner end of the pin is adapted to enter openings 47 in the inner side plates 24. There are a series of these openings adapted for different depths of the frame 7 my hand.

LYLE D. LEWIS.

and the pin is intended to lock the frame in a position to bring the opening 37 perpendicular to the bottom of'the gain. With the frame thus locked the hole for the cross arm screws is formed in the pole at the bottom of the gain, as clearly indicated in Fig. 2.

In operation, the frame is putin place, the chain tightened. The saw and knives are reciprocated clearing out the gain. The frame is locked and the hole drilled and the frame removed with the gain complete and ready to receive the screw.

What I claim as new is 1. In a gain making device, the combina tion of a main frame; means for securing the frame to a pole; a guide frame; and reciprocating gain side and bottom forming cutters carried by the guide frame.

2. In a gain making device, the combination of a main frame; means for securing the frame toa pole; a guide frame; and reciprocating cutters carried by the guide frame comprising side saws adapted to cut the sides of a gain and fiat knives adapted to finish the bottom of a gain.

p 3. In a gain making device, the combination of a. main frame; means for securing the main frame to a pole; a sliding; and tilting guide frame having its axis positioned directly above the face of the cut; and reciprocating cutters carried by the guide frame.

, 4. In a gain making device, the combination of a main frame; means for securing the main frame to a pole; a tilting and sliding guide frame; and reciprocating cutters carried by the guide frame, comprising side saws and intermediate knives.

5. In a gain making device, the combination of a mainframe; a guideframe; and reciprocating cutters carried by the guide frame comprising side saws adapted to cut the sides of a gain and knives adapted to finish the bottom of a gain.

6. In a gain making device, the combina-v tion of a main frame; means for securing the frame to a pole comprising a tightening means and alock to secure the means; aguide frame; and reciprocating gain side and bottom forming cutters carried by the guide frame.

'7. In a gain making device, the combina-' tion of a main frame; means for securing the main frame to a pole; an adjustable guide 

